P2: Key Words

Question	Answer
Electromagnetic Spectrum	A continues arrangement that displays electromagnetic waves in order of increasing frequency
Photon	Packet of energy carried by electromagnetic radiation
Ion	A positive or negative charged particle which is formed when an atom or a group of atoms looses or gains electrons
Risk	a danger associated with a procedure, action or event (could be associated with health)
Photosynthesis	The chemical process that takes place in green plants where water combines with carbon dioxide to produce glucose, using light energy
ozone layer	layer of gas in the upper atmosphere the absorbs ultra violet radiation
green house affect	the process where the earth is kept warm by the atmosphere reflecting heat back down towards the earth, preventing it from escaping into space.
carbon cycle	the constant re cycling of carbon by the process in life death and decay
decomposer	organism that breaks down other matter
deforestation	destruction of forest by cutting down trees
Global warming	gradual increase in the average temperature on earth
Digital	signal that uses binary code to represent information. Has two states: on (1) and off (0)
noise	unwanted frequencies in a signal that can distort it
Byte	sequence of eight bits used in digital signals to represent a number or character.
Memory stick	a devise that stores digital information in the form of bytes

Resource summary

	Created by justbuysomemilk over 10 years ago